MX348381B - Metodo para insertar una marca de agua en un contenido comprimido cifrado por al menos una clave de contenido. - Google Patents

Metodo para insertar una marca de agua en un contenido comprimido cifrado por al menos una clave de contenido.

Info

Publication number
MX348381B
MX348381B MX2015014979A MX2015014979A MX348381B MX 348381 B MX348381 B MX 348381B MX 2015014979 A MX2015014979 A MX 2015014979A MX 2015014979 A MX2015014979 A MX 2015014979A MX 348381 B MX348381 B MX 348381B
Authority
MX
Mexico
Prior art keywords
content
key
descrambler
compressed
data
Prior art date
Application number
MX2015014979A
Other languages
English (en)
Other versions
MX2015014979A (es
Inventor
Hunacek Didier
Servet Patrick
Son Tran Minh
Sarda Pierre
Original Assignee
Nagravision Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nagravision Sa filed Critical Nagravision Sa
Publication of MX2015014979A publication Critical patent/MX2015014979A/es
Publication of MX348381B publication Critical patent/MX348381B/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8358—Generation of protective data, e.g. certificates involving watermark
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4405—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving video stream decryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835—Generation of protective data, e.g. certificates
    • H04N21/8355—Generation of protective data, e.g. certificates involving usage data, e.g. number of copies or viewings allowed
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/16—Program or content traceability, e.g. by watermarking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
    • H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
    • H04N1/3232—Robust embedding or watermarking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Technology Law (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Editing Of Facsimile Originals (AREA)
  • Storage Device Security (AREA)

Abstract

El objeto de la presente invención es aplicar la inserción de una marca de agua en un contenido recibido por un dispositivo cliente, en particular a contenido de video comprimido. La presente invención propone un método para insertar una marca de agua en un contenido comprimido cifrado por lo menos por una clave de contenido (clave de CA), dicha clave de contenido, así como también los datos de premarcado forman los datos del CAS, dichos datos del CAS están cifrados mediante una clave de transmisión y contienen por lo menos una firma para autenticar todos o parte de los datos del CAS, dicho contenido comprimido recibido por un dispositivo cliente comprende: - un decodificador (103) que tiene una entrada para recibir el contenido comprimido cifrado y una salida para producir un contenido comprimido, - un insertador de WM (104) conectado directamente a la salida del decodificado; dicho insertador de WM están conectados con el condicionador (200), dicho condicionador ejecuta los siguientes pasos: - recibir los datos del CAS, - descifrar los datos del CAS con la clave de transmisión, - verificar la firma de los datos del CAS y si la firma es válida, - transferir la clave de contenido (clave de CA) al decodificador (103) y los datos de premarcado al insertador de WM. - insertar una marca de agua mediante el insertador de WM, el contenido descifrado recibido por el decodificador usando los datos de premarcado y el identificador.
MX2015014979A 2013-04-26 2014-04-28 Metodo para insertar una marca de agua en un contenido comprimido cifrado por al menos una clave de contenido. MX348381B (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13165597.9A EP2797335A1 (en) 2013-04-26 2013-04-26 Method to watermark a compressed content encrypted by at least one content key
PCT/EP2014/058628 WO2014174122A1 (en) 2013-04-26 2014-04-28 Method to watermark a compressed content encrypted by at least one content key

Publications (2)

Publication Number Publication Date
MX2015014979A MX2015014979A (es) 2016-02-05
MX348381B true MX348381B (es) 2017-06-09

Family

ID=48226998

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2015014979A MX348381B (es) 2013-04-26 2014-04-28 Metodo para insertar una marca de agua en un contenido comprimido cifrado por al menos una clave de contenido.

Country Status (11)

Country Link
US (2) US9729941B2 (es)
EP (2) EP2797335A1 (es)
JP (1) JP6438459B2 (es)
KR (1) KR20160002844A (es)
CN (1) CN105432092B (es)
BR (1) BR112015027089B1 (es)
CA (1) CA2908404C (es)
ES (1) ES2745401T3 (es)
MX (1) MX348381B (es)
SG (1) SG11201508181SA (es)
WO (1) WO2014174122A1 (es)

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EP3113501A1 (en) 2015-06-29 2017-01-04 Nagravision SA Content protection
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Also Published As

Publication number Publication date
US9729941B2 (en) 2017-08-08
CA2908404A1 (en) 2014-10-30
JP2016522435A (ja) 2016-07-28
ES2745401T3 (es) 2020-03-02
CA2908404C (en) 2021-10-12
BR112015027089A2 (pt) 2017-07-25
WO2014174122A1 (en) 2014-10-30
MX2015014979A (es) 2016-02-05
US20160080831A1 (en) 2016-03-17
US10015564B2 (en) 2018-07-03
BR112015027089B1 (pt) 2023-10-31
CN105432092A (zh) 2016-03-23
EP2989805A1 (en) 2016-03-02
CN105432092B (zh) 2018-10-09
US20170339472A1 (en) 2017-11-23
BR112015027089A8 (pt) 2019-12-24
EP2797335A1 (en) 2014-10-29
KR20160002844A (ko) 2016-01-08
EP2989805B1 (en) 2019-07-03
JP6438459B2 (ja) 2018-12-12
SG11201508181SA (en) 2015-11-27

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